Doc - Fix link in Drain.md

Author: Simran-B

docs/Manual/Deployment/Kubernetes/Drain.md

@@ -431,7 +431,7 @@ above.
 Finally, it is likely that the shard distribution in the "new" cluster
 is not balanced out. In particular, the new _DBSserver_ is not automatically
 used to store shards. We recommend to
-[re-balance](../../Administration/Cluster/#movingrebalancing-shards) the shard distribution,
+[re-balance](../../Administration/Cluster/README.md#movingrebalancing-shards) the shard distribution,
 either manually by moving shards or by using the _Rebalance Shards_
 button in the _Shards_ tab under _NODES_ in the web UI. This redistribution can take
 some time again and progress can be monitored in the UI.